Machine for making mechanical drawings



Dec. 11, 1962 T. MATsoN MACHINE FCR MAKING MECHANICAL DRAWINGS 3 Sheets-Sheet 1 Filed Feb. 5, 1959 NN Nm O9 Nm ATTORNEY Dec. 11, 1962 T, MA1-50N MACHINE FOR MAKING MECHANICAL DRAWINGS Filed Feb. 5, 1959 3 Sheets-Sheet 2 QNVENTOR TAYLOR MATSON ATTORNEY DeC- 11, 1962 T. MA1-SON 3,067,517

MACHINE FCR MAKING MECHANICAL DRAWINGS Filed Feb. 5, 1959 3 Sheets-Sheet 3 66 6,3 L WJ- L l lllll'IllIlIl] sank/7e TA'YLOR MATSON ATTO R N EY United States Patent O 3,067,517 MACHINE FOR MAKING MECHANICAL DRAWINGS Taylor Matson, 6141 W. Girard Ave., Philadelphia, Pa. Filed Feb. 5, 1959, Ser. No. 791,437 3 Claims. (Cl. 33-26) t This invention relates to a mechanical drawing maklng machine of the type shown in my Patent'No. 2,219,- 783 of October 29, 1950, entitled Mechanical Drawing Machine.

The object of the invention is to produce an improved machine of the type set forth.

The full nature of the invention will be understood from the following specification and the accompanying drawings in which:

FIG. 1 is a perspective view of a machine embodying the invention.

FIG. 2 is a top plan View of the same.

FIG. 3 is a front elevational view of the same.

FIG. 4 is an enlarged sectional view taken on line 4 4 on FIG. 2.

FIG. 5 is an enlarged sectional view taken on line 5-5 on FIG. 2.

FIG. `6 is an enlarged sectional view taken on line 6-6 on FIG. 2.

FIG. 7 is a reproduction of the center portion of FIG. 2 but showing the parts in raised, or non-use position.

The machine illustrated includes a platform 10 which may be secured to a table top or other support 12. Platform 10 is provided with a stub shaft 14 for supporting a rotary work table 16. Platform 10 also supports a block 18, which is omitted from FIG. 3 and which carries a fixed index 20 which coacts with a scale 21 on table 16. Platform 10 also carries uprights 22 which `support horizontal frame members 24. l

To uprights 22 are secured, as by bolts 26, racks 28 and 30 and, as will be best seen from FIG. 2, rack 28 is separated from adjacent horizontal frame 24 by av pair of end spacers 32. This provides space for receiving and permitting the movement of vertical and horizontal adjusting devices which will be hereinafter described. 34 designates slides which are movable on horizontal frame members 24 and which carry a housing formed of a front flexible, sheet metal channel 36 and a rear flexible, sheet metal channel 38 which are secured together by bolts 40 as best shown in FIG. 4. Channel 38 is inverted, relative to channel 36 and includes the top wall 42, side walls 44 and bottom flanges 46 which are secured as a-t 48 to slide 34 therebelow (FIG. l). Inverted channel 38 is provided with end bars 50 which carry a shaft 52 on the ends of which are mounted gears 54 and 56 which engage racks 23 and 30 respectively. Gear 54 is rotatable lby means of a bevel gear 58 which is carried by shaft 52 and which is engaged by a bevel gear 60 on shaft 62 which extends upwardly through the top 42 of inverted channel member 38 and is provided with a knob 63. By this arrangement, channel 38 can be moved, jointly with channel 36, in the direction of double headed arrow 64 by means of handles 66, or by rotation of shaft 62. For rough, or approximate adjustment, the entire housing is moved by handles 66 and for nice adjustment, the entire housing is moved by rotation of shaft 62.

Inverted channel 38 carries a scale 70 which co-acts with a pointer 68. To facilitate reading Ithe fine divisions of the scale, a magnifying glass 72 is mounted above the pointer.

Front channel 36 includes a bottom wall 74, side walls 76 and upper flanges 78 and is secured to slides 34 as at 80 (FIG. 1). Upper flanges 78 of front channel 36 support a slide 82 which is movable to and fro in the direction of a double headed arrow 84 (FIG. 2) by means 3,067,517 Patented Dec. 11, 1962 of the previously referred to handles 66. This movement suffices for rough, or approximate, adjustment, but for nicer adjustment, slide 82 is movable by means of a gear 86 which engages rack 88, FIG. 2, and is rotatable by means of a shaft 90 which terminates in knob 91 of FIG. 4. Rack 88 is carried by legs 92 which are secured to bottom wall 74 of a front channel 36.

Slide 82 carries a plate 94, one end of which carries the previously mentioned pointer 68 and the other end of which is bent down to form vertical wall which terminates in a horizontal plateform 104. Plate 94 also carries a downwardly biased flat spring 96, the tension of which is adjusted by a set screw 98. The free end of spring 96 is notched to engage a groove formed in a cylindrical weight 100 which carries a thimble 102 for receiving a writing instrument such as pencil 108. In the absence of any pressure exerted by spring 96, pencil 108, or other tool, will draw a line the thickness of which depends on the pressure exerted by weight 100. If a heavier line is desired, screw 98 is adjusted to cause spring 96 to exert additional pressure on pencil 108. Pencil 108 passes through anV opening in platform 104 which is a horizontal extension of vertical wall 95, and lwhich carries pin 105 which, when engaged by pin 107 on weight 100, limits the rotation `of the weight. i

Sliding freely on pencil 108 is a sleeve 112 which carries a block 114 through which pass arms 116 which carry a sleeve 119. Sleeve 119 is disposed at an acute` angle and carries an instrument 120 which is adjustable vertically by set screw 121. The `distance between writing instrument 120 and the axis of pencil 108 is adjustable by loosening set screw 118 and moving arms 116 to the right or t-o the left in the direction of double headed' arrow 123. See FIG. 1. 122 designates an arm which is adjustably securedl to plate 82 by clip 128 and screw 124, FIG. 1. 125 designates a rod which carries a stylus or the like, 126, and is adjustably secured, by a screw'127, to arm 122. As will be seen from FIG. 1, when instrument 10S, 120 or 126 is in its lower position, it operates on paper 134 which is fixed on turn table 16. 1

In order to raise the instrument 108 from contact with the paper, I provide lever 136, the vertical wall of which is pivoted at 135 to wall 95 and the horizontal wall of which is engageable with the underside of weight 100. Lever 136 is provided, on the side thereof which abuts wall 95, with a notch 139 for engagement with pin 137. By this arrangement, raising the outer end of lever 136 until pin 137 engages notch 139 raises weight 100 and pencil 108 out of contact with the paper. It will be understood that, when it is desired to raise pencil 108, the tension of spring 96 is reduced, or eliminated, by proper manipulation of adjustment screw 98.

To take instrument 120 out of contact with the paper, I provide hook 140 which rotatably depends from platform 104 and which, when sleeve 112 is raised, is engageable with flange 113 at the top of sleeve 112 to hold the latter in its raised position in which instrument 120 will be out of contact with the paper.

Slide 34 carries a pointer 144 which is adapted to coact with scale 146 adajacent rack 30. In order to make the horizontal walls of slides 34 exactly parallel to the horizontal walls of frames 24, I provide adjustment screws 148 which pass through the horizontal walls of slides 34 and bear on the top walls of slides 34. In order to make the vertical walls of slides 34 parallel to the vertical walls of frames 24, I provide adjustment screws 150 which pass through the vertical walls of slides 34 and bear against vertical sides of frame 24.

In order properly to align the rack 28 with adjacent frame member 24 and slide 34, I provide plates 152 having adjustment slots 154 for receiving fastening screws 156 which also engage the horizontal wall of slide 34, as best shown in FIG. 6. The outer end portions of plates 152 are bent down and engage the space between rack 28 and frame member 24.

The operation is as Ifollows:

To use the machine, rod 125 is raised by loosening set screw 127, shaft 102 is raised by lever 136 and held in its upper position by engaging lever 136 with pin 137 and sleeve 112 is raised and held in its raised position by hook 140, all as shown in FIG. 7. This raises all of the instruments above the work table 16 to permit placement of the paper or other material. After the paper has been placed in position, and if it is 'desired to mark certain locations, rod 125 is released and can be manually raised and lowered to mark the paper as the paper is rotated on work table 16. If it is desired to use the stylus to pin the paper on the work table, or to prevent rotation of the work table, the stylus is lowered into engagement and is locked in that position.

If it is desired to use instrument 108 only, lever 136 is disengaged from pin 137. and spring 96 and weight 100 can be adjusted to work together to bring instrument 108 intoy contact with the paper with the `desired pressure. For example, by reducing the tension of spring 96, the lines drawn would be lighter and vice versa. If it is desired to use instrument 120 only, shaft 102 is raised and. sleeve 112 is lowered, as far as it will go, and if that is not enough, instrument 120 will be -lowered relative to sleeve 119.

It will be noted that by making the housings 36 and 38 of sheet metal and providing `the adjustments shown in FIGS. 5 and 6, a drawing machiney can be produced which is very much lighter and very much less expensive than a machine in which the carriages are cast and have tov be accurately machined..

What I claim is:

l. A machine for making mechanical drawings, said machine including: v

a paper supporting platform,

a pair of spaced, rigid parallel frames carried by said platform, each having a vertical surface and a horizontal surface,

a first rack carried by at least one of said frames,

a first flexible housing,

a second flexible housing,

means securing said housings for joint movement,

a gear carried by one of said housings and engaging said first rack for moving said carriage longitudinally of said first rack,

a second rack carried by one of said housings and normal to said first rack,

d a carriage carried by said one housing, a second gear carried by said carriage and engaging said second rack for moving said carriage transversely of said first rack, l 5 a pair of slides carried by the opposite ends of said housings and engaging the vertical and 4horizontal sides of said frames,

Writing instruments carried by one of said housings,

and means for horizontally and vertically adjusting said `slides relative to said frames to square said housing and said writing instruments relative to said frames.

2. A machine for making mechanical drawings, said machine including:

a platform adapted to support drawing paper,

a movable carriage,

a weight carried thereby,

a first writing instrument carried by said weight,

a spring carried by said carriage and adapted to bear on said rst instrument,

means for selectively controlling the action of said spring,

a sleeve enclosing, and freely slidable rela-tive to, said rst instrument,

a second instrument carried by said sleeve, and

a rotary hook carried by said carriage and engageable with said sleeve when the latter is raised to take saidy second instrument out of contact with said paper.

3. The structure recited in claim 2 and a lever pivoted to said carriage and engageable with said weight and mov- 30 able to a position to lift said rst instrument out of contact with the paper and means for maintaining said lever in said position.

References Cited in the file ofthis patent OTHER REFERENCES Publication, Emmert Drafting Machines, published by the Emmert Mfg. Co., Waynesboro 2, Pa. Bulletin No. 6-48. Received in PO. O., June 13, 1952, copy in Div. 66. 

